Yii2 & mpdf - how to print/display current search criteria into pdf[SOLVED]

I've been trying to implement MPDF over the search function from Yii2 advanced template.

So basically, when I put the value inside the textField(sales_id), the Print Button will display pdf report using MPDF extension where the condition is that the data showed in mpdf should only contains similar sales_id value in it's fields, like this image below: